muscles of the shoulder and arm

Question 1

what is this muscle? Origin? Insertion? Action?

Answer 1

deltoid
Origin: acromion end of scapula/clavicle insertion
Insertion: humerus
origin: abducts humerus

Question 2

what is this muscle? Origin? Insertion? Action?

Answer 2

infraspinatus
origin: infraspinatus fossa
insertion: humerus
action: laterally rotates humerus

Question 3

what is this muscle? Origin? Insertion? Action?

Answer 3

teres minor
origin: scapula
insertion: humerus
action: laterally rotates humerus

Question 4

what is this muscle? Origin? Insertion? Action?

Answer 4

teres major

Origin: scapula
Insertion: humerus
Action: medially rotates humerus

Question 5

what is this muscle? Origin? Insertion? Action?

Answer 5

subscapularis

origin: subscapular fossa of scapula of scapula
insertion: humerus
action: medially rotate arms

Question 6

what is this muscle

Answer 6

teres major

Question 7

what is this muscle? Origin? Insertion? Action?

Answer 7

coracobrachialis

origin: scapula
insertion: humerus
action: flexion and medial rotation of humerus

Question 8

what is this muscle? Origin? Insertion? Action?

Answer 8

biceps brachii

origin: scapula + supraglenoid tubercle
insertion: shaft of humerus
action: flex elbow and shoulder

Question 9

what is this muscle? Origin? Insertion? Action?

Answer 9

triceps brachii

origin: glenoid cavity
insertion: ulna
action: flex elbow

Question 10

what is this muscle? Origin? Insertion? Action?

Answer 10

brachialis

origin: distal anterior humerus
insertion: ulna
action: flex elbow

Question 11

what is this muscle? Origin? Insertion? Action?

Answer 11

supraspinatus

(under deltoid)

Origin: supraspinous fossa
Insertion: humerus
action: abduct humerus

Question 12

what is this muscle?

Answer 12

infraspinatus

Question 13

what is this muscle?

Answer 13

teres minor

Question 14

what is this muscle?

Answer 14

teres major